diff options
author | vjiaoblack <vjiaoblack@google.com> | 2016-08-25 06:30:23 -0700 |
---|---|---|
committer | Commit bot <commit-bot@chromium.org> | 2016-08-25 06:30:23 -0700 |
commit | e6f5d5623160a69e1585f5121a3695092327dfe0 (patch) | |
tree | 44a73f37db340157c73e005841207e52210e78d0 /include/private | |
parent | 199a2ea665a088dafb2fd364f3aa6a642bfa2fef (diff) |
Made shadows blurry (thru implementing variance mapping)
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2224163005
Review-Url: https://codereview.chromium.org/2224163005
Diffstat (limited to 'include/private')
-rw-r--r-- | include/private/SkRecords.h | 3 | ||||
-rw-r--r-- | include/private/SkShadowParams.h | 48 |
2 files changed, 50 insertions, 1 deletions
diff --git a/include/private/SkRecords.h b/include/private/SkRecords.h index 14b653190a..637a2ef68c 100644 --- a/include/private/SkRecords.h +++ b/include/private/SkRecords.h @@ -268,7 +268,8 @@ RECORD(DrawPicture, kDraw_Tag|kHasPaint_Tag, RECORD(DrawShadowedPicture, kDraw_Tag|kHasPaint_Tag, Optional<SkPaint> paint; sk_sp<const SkPicture> picture; - TypedMatrix matrix); + TypedMatrix matrix; + const SkShadowParams& params); RECORD(DrawPoints, kDraw_Tag|kHasPaint_Tag, SkPaint paint; SkCanvas::PointMode mode; diff --git a/include/private/SkShadowParams.h b/include/private/SkShadowParams.h new file mode 100644 index 0000000000..3df0a44279 --- /dev/null +++ b/include/private/SkShadowParams.h @@ -0,0 +1,48 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkShadowParams_DEFINED +#define SkShadowParams_DEFINED + +/** \struct SkShadowParams + + This struct holds information needed for drawing shadows. + + fShadowRadius - radius of the shadow blur + + fBiasingConstant - A constant used in variance shadow mapping to directly + 0.0 - 1.0 reduce light bleeding. Essentially sets all shadows + ~.25 below a certain brightness equal to no light, and does + a linear step on the rest. Essentially makes shadows + darker and more rounded at higher values. + + fMinVariance - Too low of a variance (near the outer edges of blurry + ~512, 1024 shadows) will lead to ugly sharp shadow brightness + distortions. This enforces a minimum amount of variance + in the calculation to smooth out the outside edges of + blurry shadows. However, too high of a value for this will + cause all shadows to be lighter by visibly different + amounts varying on depth. + + fType - Decides which algorithm to use to draw shadows. +*/ +struct SkShadowParams { + SkScalar fShadowRadius; + SkScalar fBiasingConstant; + SkScalar fMinVariance; + + enum ShadowType { + kNoBlur_ShadowType, + kVariance_ShadowType, + + kLast_ShadowType = kVariance_ShadowType + }; + static const int kShadowTypeCount = kLast_ShadowType + 1; + + ShadowType fType; +}; + +#endif |